Stripper element mounted on a system of a stripping device

ABSTRACT

The invention relates to a stripping element (4) for placing on a system support or carrier (3) of a stripping device (1) for the discharge and of a conveyor belt (2), which has a stripping plate (8), which is in the ready-to-operate position engages in stripping manner on the conveyor belt (2), a plate support (9), to whose upper end is fixed the stripping plate (8), a torsion spring joint (7) on which the plate support (9) is guided in pivotable and spring-loaded manner about a horizontal axis, a base (6) on which is held the torsion spring joint (7) and which is placed on the system carrier (3), a vertical adjustment device (21, 26; 44, 51) for the vertical adjustment of the stripping plate (8) along a first axis (A1), a pivot bearing (17, 34) for pivoting the stripping plate (8) about a second axis (A2) for setting the parallelism of the stripping edge of the stripping plate (8 ) with respect to the conveyor belt (2). In order to achieve a compact, easily assemblable and disassemblable, as well as adjustable construction the first axis (A1) of the vertical adjustment device (21, 26; 44, 51) and the second axis (A2) of the pivot bearing (17, 34) are located on the same line. As a result the vertical adjustment device and the pivot bearing can be jointly arranged as a constructional unit in a tube socket (5, 35).

BACKGROUND OF THE INVENTION

The invention relates to a stripping element for placing on a systemsupport or carrier of a stripping device for the discharge end of aconveyor belt, which has a stripping plate, which in theready-to-operate position engages in stripping manner on the conveyorbelt, a plate support, to whose upper end is fixed the stripping plate,a torsion spring joint on which the plate support is guided in pivotableand spring-loaded manner about a horizontal axis, a base on which isheld the torsion spring joint and which is placed on the system carrier,a vertical adjustment device for the vertical adjustment of thestripping plate along a first axis, a pivot bearing for pivoting thestripping plate about a second axis for setting the parallelism of thestripping edge of the stripping plate with respect to the conveyor belt,the second axis forming an angle smaller than 90° with the conveyor beltportion running onto the stripping plate.

European patent 254 977 discloses a stripping device for the return areaof conveyor belts, which comprises an adjustable, fixed or resilientlymounted system carrier or support extending transversely to the conveyorbelt running direction and a plurality of stripping elements in eachcase held on bases. The stripping elements are fixed in juxtaposedmanner to the system carrier and in each case carry a stripping plate ordisk set in stripping manner with respect to the conveyor belt movementdirection. The stripping plates are mounted in pivoted manner by atorsion spring about an axis at right angles to the conveyor beltrunning direction and resiliently for an elastic deflection movementabout said axis. A deflection movement is e.g. performed if obstaclesadhering firmly to the conveyor belt strike the stripping plate. For thesetting and engagement of the stripping plate on the associated beltarea, each stripping element has a vertical adjustment device and forthe preferably automatic setting of the parallelism of the strippingplate with respect to the conveyor belt has a pivot bearing for pivotingabout an axis, which forms an angle smaller than 90° with the conveyorbelt portion running onto the stripping plate.

These known stripping elements have a high stripping capacity, becausethey also react rapidly to minor displacements of the conveyor beltunderface or are easily adjustable and can automatically assume anoptimum position for the stripping of impurities adhering to theconveyor belt.

SUMMARY OF THE INVENTION

The problem of the invention is to so further develop a strippingelement of the aforementioned type that, in conjunction with easyassembly and disassembly of the stripping element and/or the platesupport, a compact unit with a particularly simple vertical adjustmentdevice is provided.

In the case of a stripping element of the aforementioned type thisproblem is solved in that the firs axis associated with the verticaladjustment device and the second axis associated with the pivot bearingare located on the same line. This leads to a compact unit, permittingin simple and space-saving manner both a vertical adjustment and anautomatic pivoting of the stripping plate. The pivot bearing andvertical adjustment device can be constructionally combined. Inaddition, this unit is easy to assemble and fit and can therefore beeasily replaced in the case of a defect, which leads to high maintenancefriendliness.

According to a further embodiment of the invention the pivot bearingcomprises a bearing bush connected to the system carrier and placed innon-rotary manner in a tube socket and a journal connected to the platesupport and the stripping plate and pivotably mounted in the bush. Thisnot only permits rational manufacture, but also a good transfer of theforces acting in operation with a space-saving construction.

It is particularly appropriate if the vertical adjustment device isconstructed for the adjustment of the height of the journal with respectto the bearing bush and preferably a locking screw on the side remotefrom the plate support can be screwed into the bearing bush for theaxial longitudinal fixing of the said bush in the tube socket. Thefixing of the stripping element or its plate support in the tube socketis brought about by a single locking screw which, in the fitted,operational position, can be located within the tube socket, isaccessible from the lower side and can in particular be operated with asingle wrench. Therefore the fitting and removal of the strippingelement is particularly simple.

Fundamentally the height or vertical adjustment takes place via thesystem carrier position. The aforementioned vertical adjustment deviceis provided for the individual setting of the stripping elements. Thisvertical adjustment device, according to an embodiment of the invention,also incorporates a setscrew accessible through or in the locking screwand whose fixing takes place by frictional engagement outside theadjustment. Thus, the vertical adjustment can once again take place witha single tool by simply turning the setscrew in one or other direction.The setscrew is positioned in a protected manner on the underside of thetube socket, so that it cannot be damaged by the stripping off material,or by rain and the like. Optionally, it is possible to fit a protectivecap.

It is particularly advantageous to make the bearing bush from plastic,whilst ensuring that the tube socket receiving the base and journal aremade from steel. This prevents a direct contact of the steel parts movedrelative to one another, so that rusting cannot occur. In the case of askillful choice of the plastic material, this leads to a good slidingproperty, so that independently of lubricants, a good pivotability ofthe journal within the bush is ensured. This pivotability of thestripping element about the second axis coinciding with the centre axisof the tube socket is important for the automatic parallel setting ofthe edge of the stripping plate with respect to the conveyor beltsurface. The prerequisite for this is that the pivot axis is at an anglesmaller than 90° to the conveyor belt plane.

A compact construction of the stripping element and a flat arrangement,which leads to further advantages, is achieved in that the base of thestripping element when fitted in the stripping device extendssubstantially parallel to the conveyor belt running direction and thetorsion spring joint is fixed by one spring and to the free end of thebase and to the other spring end is fitted the pivot bearing with theplate support.

It is also appropriate if the pivot bearing in the installed position islaterally displaced with respect to the centre axis of the base on thetorsion spring joint, which leads to a more compact construction.

According to a further embodiment of the invention the base is securedin the mounting support by a fixing means, e.g. a screw, extending inthe axial direction thereof. This construction permits a rapid, simplereplacement of the stripping elements.

Alternatively to the construction of the mounting support of the platesupport and/or the stripping element with a permanently automaticallyfreely adjustably stripping edge of the stripping plate, the platesupport is fixable in predetermined pivot positions in the pivotbearing. Thus, once a pivot position has been set, it can be easilyfixed by a locking means.

The pivot bearing preferably has a tube socket forming the bearingcasing, a metallic intermediate bush displaceable and adjustable alongthe first axis, as well as a bearing bush, which forms the pivot bearingsurface and which is preferably made from plastic, in which the journalcarrying the plate support is rotatably mounted. By means of a screw inthe tube socket, which enters a groove in the intermediate bush, it iseasy to adjust the height of the journal. Apart from an easy verticaladjustability, this arrangement ensures a free rotary mounting of thejournal and the plate support without any need for maintenance whilst atthe same time leading to a long service life, whilst, if necessary, theplate support with the journal, bearing bushes and intermediate bush canbe removed as a whole from the outer sleeve of the pivot bearing.

Thus, the stripping element according to the invention is an easilyhandlable unit, which can be packed, handled and replaced in simplemanner. In particular the fitting and removal on the system support ofthe stripping device and the vertical adjustment can be brought aboutwith particular simplicity. Reference should be made to the subclaimsand details concerning preferred constructions.

BRIEF DESCRIPTION OF THE DRAWINGS

Further advantages and features of the invention can be gathered fromthe following description of several embodiments with reference to theattached drawings, wherein show:

FIG. 1 A front view of part of a stripping device with a strippingelement in the fitted state according to a first embodiment of theinvention.

FIG. 2 A side view of the stripping device of FIG. 1.

FIG. 3 A side view of a system carrier of the stripping device of FIGS.1 and 2 with a sectionally represented stripping element and a furtherstripping element.

FIG. 4 A sectional view through the stripping element along line IV--IVof FIG. 3.

FIG. 5 A front view of a stripping device with four stripping elementsaccording to a fourth embodiment of the invention.

FIG. 6 A plan view of the stripping device of FIG. 5.

FIG. 7 A lateral sectional view through a tube socket and a base of oneof the stripping elements and through the system carrier of thestripping device of FIGS. 5 and 6.

FIG. 8 A lateral sectional view through a tube socket and a base of astripping element in a stripping device according to a third embodimentof the invention.

FIG. 9 A lateral sectional view through a tube socket and a base of astripping element in a stripping device according to a fourth embodimentof the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The embodiments of a stripping device 1 according to the invention shownin the drawings are used for the stripping of conveyor belts 2 drawn ina direction G. Therefore the stripping device 1 is placed below theconveyor belt 2. The stripping device 1 is provided with a systemcarrier 3 extending at right angles to the conveyor belt 2 and on whichare provided in juxtaposed manner several stripping elements 4 displacedin the direction of the conveyor belt 2. For receiving the strippingelements 4 the system carrier 3 of the stripping device 1 has severaltube sockets 5 or mounting supports 33.

The stripping element 4 fundamentally comprises a base 6, a torsionspring joint 7 directly or indirectly connected to the base 6 and aplate support 9 carrying at its upper end a stripping plate 8 and whichis connected to the torsion spring joint 7.

The stripping plates 8 clean the conveyor belt surface in that theyengage in stripping or scraping manner thereon. They adapt to theunevennesses of the conveyor belt 2, so that there is no running onto acorner of a stripping plate 8. The compensating movement takes place bypivoting the plate support 9 or the stripping element 4 in a pivotbearing about an axis A. Thus, the pivot bearing ensures the automaticsetting of the parallelism of the stripping edge of the stripping plate8 with respect to the involved area of the conveyor belt surface. Thestripping plate 8 is vertically adjustable along the axis A through avertical adjustment device. The axis A forms with the portion of theconveyor belt 2 running onto the stripping plate 8 an angle which issmaller than 90°.

FIGS. 1 to 4 show a first embodiment of the stripping element 4 in thestripping device 1. The stripping elements 4 are juxtaposed at rightangles to the running direction of the conveyor belt 2 and displaced inthe running direction of the latter in such a way that there areoverlapping cleaning areas of the stripping plates 8.

Each stripping element 4 is held on the system carrier 3 tube by a tubesocket 5 in which it is inserted with its cylindrical base 6. The tubesocket 5 is a fixed part of the tubular system carrier 3 running atright angles to the movement direction of the conveyor belt 2. Thesystem carrier 3, to which are welded several tube sockets 5, extendsover the entire width of the conveyor belt 2 and is fitted by means ofspring-loaded rocker arms 10 on both sides of the belt 2 to in each caseone spindle 11, which by means of a plate 12 shown in FIGS. 1 and 2 isfixed to a not shown frame or support structure of the belt 2. Thesystem carrier 3 is preferably constructed in mirror symmetrical manner.To facilitate the understanding of FIGS. 1 to 4 only part of thestripping device 1 is shown.

Each tube socket 5 carries a stripping element 4 which, as statedhereinbefore, essentially comprises the base 6, the torsion spring joint7 and the plate support 9 with the stripping plate 8. Whilst the platesupport 9 is connected to an inner square end 13 of the torsion springjoint 7, the base 6 is connected to the casing 14 of the torsion springjoint 7, cf. FIG. 3. In known manner the torsion spring joint 7 containsrubber elements 15, so that the square end 13 is centred andspring-loaded. The expert is well aware of the function of such torsionspring joints, also for stripping elements, so that there is no need fora more detailed description here.

In order to more particularly ensure an automatic setting of theparallelism of the stripping edge of the stripping plate 8 with respectto the conveyor belt 2, the stripping 4 is pivotably mounted about anaxis A in a pivot bearing. The pivot bearing is formed by the tubesocket 5, a plastic bearing bush 17 located in the socket 5 and by thebase 6 of the stripping element 4 mounted in rotary manner in the bush17. At the upper end of the tube socket 5 there are two recesses, inwhich each case engages a projection 16 of the bush 17. The recesses andprojections 16 are circumferentially arranged in such a way that onlyone arrangement of the bush 17 in the socket 5 is possible. The bush 17extends approximately over the entire length of the socket 5 and has onits underside and internal thread into which is screwed a locking screw18. The locking screw 18 is a socket-head screw with a cross-sectionallycircular edge, whose diameter is somewhat smaller than the internaldiameter of the tube socket 5. In the installed position the lockingscrew 18 presses a conical face against the lower end of the bearingbush 17 and an O-ring 19 is pressed outwards by the conical face againstthe wall of the socket 5 and into a groove provided thereof. Thissituation is shown in FIGS. 3 and 4. In this position the locking screw18 is screwed into the tube socket 5 in clearance-free,rotation-prevented manner, namely by frictional engagement.

On releasing the locking screw 18 the O-ring returns to its untensionedstarting position. With the locking screw 18 loosened the bearing bush17 with the screw 18 can be drawn upwards out of the socket 5.Conversely this permits an easy insertion of the bush 17 into the socket5. The represented groove is not necessary for a secure seating of thestripping element 4 in the tube socket 5 and therefore in the systemcarrier 3 and is only provided as an additional securing means. It ismerely necessary to squeeze the O-ring 19 against the smooth wall of thetube socket 5 to ensure an adequate fixing.

The base 6, which is constructed as a journal, is inserted in theinterior of the bearing bush 17 and firmly welded to the basing 14 ofthe torsion spring joint 7. In its basic position the base 6 engages onthe collar 20 of an adjusting bush 21 and is pivotably connected in thepivoting direction and in clearance-free manner in the axial directionto said bush 21 with the aid of a pin connection. For this purpose theadjusting bush 21 has an elongated hole 22 through which passes a pin23, which is secured in a corresponding transverse bore in the base 6.Thus, the unit formed from the base 6, the torsion spring joint 7, theplate support 9 and the stripping plate 8 can pivot backwards andforwards by adequate angular amounts, a rotary movement of the bush 21being avoided in that a nose 24 (FIG. 4) shaped onto its collar 20 isguided in a longitudinal groove 25 of the bearing bush 17.

The adjusting bush 21 forms part of a device for the vertical adjustmentof the base 6 with respect to the bearing bush 17 and therefore thestripping plate 8 along the axis A. The vertical adjustment device willnow be described in greater detail. Within the locking screw 18 can berotated a setscrew 26, but which is kept fixed in the axial directionand for this purpose are provided a screw head and a shaft securing ring27 with a disk 28 below it and which is placed in a groove made in thesetscrew 26. The setscrew 26, which is constructed as a socket headscrew, can be turned backwards and forwards without hindrance frombelow. For this purpose it is fixed in the axial direction by the shaftsecuring ring 27 or the head, so that a rotary movement of the setscrew26 leads to an axial movement of the adjusting bush 21. As stated, thelatter cannot rotate with it, because the nose 24 prevents a rotarymovement within the longitudinal groove 25. The adjusting path islimited by a pin 29, which is drive into the bearing bush 17 and blocksan upward path within the longitudinal groove 25. The setscrew 26 issecured by an O-ring 30 by frictional engagement so as to ensure thatthere is no automatic twisting.

If a stripping element 4 is to be disassembled from a tube socket 5,firstly the locking screw 18 is loosened in the bearing bush. Thestripping element 4 can now be drawn upwards out of the tube socket 5.Assembly takes place in the reverse manner.

It is obvious that in the case of a pin connection between the base 6and the adjusting bush 21, there can also be a reversal of theconstruction, i.e. the forming of an elongated hole in the base 6 andthen the pin 23 is received in a transverse bore in the bush 21. Thus,this is the standard reversal of principle well known to the expert.

At the upper end of the bearing bush 17 is provided a pocket, into whichis inserted a sleeve 31. In addition, the sleeve 31 and the upper partof the bearing bush 17 are enclosed by a sealing cap 32. In addition,all parts are coated with a water-resistance grease, so that there is aflexible movement and an optimum corrosion protection. On the lockingscrew 18 can be mounted a not shown protective cap, which is thenremoved for adjustment and release purposes. However, even without sucha cap both screws 18 and 26 are well protected within the tube socket 5.

FIGS. 5 to 9 show a second, third and fourth embodiment of the strippingelement 4, parts acting in the same way being given the same referencesas in the first embodiment. It is common to the second, third and fourthembodiments that the base 6 of the stripping element 4 is inserted in amounting support 33, which is connected to the system carrier 3. Thebase 6 inserted in the support 33 runs parallel to the plane of theconveyor belt 2. The casing 14 of the torsion spring joint 7 is fixeddirectly to the outer end of the base 6. Between the torsion springjoint 7 and the plate support 9 is provided a pivot joint 34 in which ispivotably mounted said support 9. The square end 13 of the torsionspring joint 7 is welded to a tube socket 35 of the pivot bearing 34.

The pivot bearing 34 is laterally displaced with respect to the centreaxis of the base 6 and the mounting support 33 on the torsion springjoint 7, being fixed to the square end 13 of said joint 7, as can begathered from FIGS. 5 and 6 in conjunction with FIG. 7.

By means of a screw 36 extending axially of the mounting support 33, thebase 6 is so fixed in the latter that the screw 36 engages with itsthreaded part in a thread made in the base 6 and its screw head engageson a circular ring face of the support 33. To prevent a rotary movementof the base 6 in the mounting support 33, the base 6 has aspring-loaded, radially-displaceable pin 37 running at right angles tothe axial direction of the base 6, in a recess, which engages in acorresponding transverse bore in the support 33, if the base 6 isinserted for engagement in the support 33. This pin 37 with theassociated transverse bore also serves as a positioning aid forinserting the base 6 in the mounting support 33.

In the embodiments of FIGS. 5 to 9 both the torsion spring joint 7 andthe pivot bearing 34 and base 6 with support 33 are constructed inencapsulated manner, so as to prevent the penetration ofwear-encouraging particles, e.g. coal dust or the like.

On disassembling the stripping element 4 from the system carrier 3, thescrew 36 is loosened and the pin 37 is pressed inwards into the recessfrom the outside and then the stripping element 4 with the base 6 can bedrawn out of the mounting support 33. The stripping element 4 can thenbe inserted in reverse order with the base 6 in the mounting support 33and can again be fixed with the screw 36. However, it is also possibleto draw the plate support 9 out of the pivot bearing 34, as is apparentfrom the description of the individual embodiments.

The pivot bearing 34 according to FIGS. 5 to 7 of the second embodimentof the stripping element 4 comprises the tube socket 35, an intermediatesleeve 38 and an upper and lower bearing bush 39, 40. The upper andlower bearing bush 39, 40 in each case have a flange edge which rests onthe front face of the intermediate sleeve 38, so that each bush 39, 40is fixed in an axial direction. The plate support 9 with its end regionfacing the stripping plate 8 is placed in the bearing bushes 39, 40 andsaid end region is constructed as a journal 41 with a stop 42. The stop42 rests on the upper bearing bush 39, so that the plate support 9 isalso axially mounted.

The tube socket 35 and the intermediate sleeve 38 are made from metaland the bearing bushes 39, 40 from plastic. On its outer face theintermediate sleeve 38 is provided with an axially directed groove 43,in which engages a screw 44 screwed into the socket 35 and has a limitedlength, as can be gathered from FIG. 7. A secure seating of the screw 44is ensured in that the tube socket 35 has a connecting piece with athread into which the screw 44 is screwed.

In order to move the plate support 9 pivotable about the axis A togetherwith the stripping plates 8 axially along the axis 8 in the heightwisedirection, it is necessary to loosen the screw 44 to such an extend thatits end 46 is released from the bottom of the groove 43, so thatsubsequently the intermediately sleeve 38, the bearing bushes 39, 40 andthe journal 41 can be moved along the axis A to the maximumcorresponding to the extension of the groove 43. The screw 44 is thenretightened, so that the intermediate sleeve 38 is again fixed relativeto the tube socket 35.

In order to disassemble the complete unit comprising the plate support9, the stripping plate 8, the journal 41, the bearing bushes 39, 40 andthe intermediate sleeve 38, it is necessary to extract the screw 44 fromthe connecting piece 45 to such an extent that the end 46 of the screw44 no longer engages in the groove 43 and the intermediate sleeve 38with the parts located therein can be drawn out of the tube socket 35.

It can be gathered from FIG. 7 that the journal 41 has a radiallyextending elongated slot 47 in which engages a pin 48 connected to theintermediate sleeve 38. It keeps the intermediate sleeve 38 on thejournal 41 in such a way that they are rotatable relative to one anotherand are only jointly axially movable when the screw 44 has been loosenedin the above-described manner. Thus, the angle of twist of the platesupport 9 in the pivot bearing 34 is limited to an angle α of 25°.

The lower face of the intermediate sleeve 38 is closed and encapsulatedby means of a plug 49, whose diameter corresponds to the externaldiameter of the intermediate sleeve 38 or is smaller than the latter.Thus, the plug 49 left in its place can be drawn out with theintermediate sleeve 38 and with the parts located therein.

FIG. 8 shows a third embodiment of the stripping element 4. Thisessentially corresponds to the second embodiment according to FIGS. 5and 7. Only the tube socket 35 is lengthened downwards and provided withan end wall 50. In the end wall 50 there is a threaded bore coaxial tothe axis A and in which engages a setscrew 51. By means of the plug 49the end of the setscrew 51 engages on the underside of the journal 41.Thus, unlike in the embodiment of FIG. 7, in the case of a verticaladjustment of the plate support 9 the journal 41 does not have to beheld on loosening the screw 44, because as a result of the weight of theconveyor belt 2 engaging on the stripping plate the plate support 9 andtherefore the journal 41 are pressed downwards. Now the journal 41,bearing bushes 39, 40, intermediate sleeve 38 and plug 49 are held bythe setscrew 51. With the screw 44 loosened the complete unit can bemoved continuously upwards and downwards by rotating the setscrew 51 andcan then be fixed again by the screw 44.

The fourth embodiment of the stripping element 4 shown in FIG. 9 differsfrom the second embodiment in that the support 9 with its journal 41 isdirectly rotatably mounted about the axis A in the tube socket 35 andthe plate support 9 can be fixed in predetermined pivoting positions byinserting and tightening the screw 44 and the resulting clamping of thejournal 41 in the tube socket 35. The vertical adjustment of thestripping plate 8 takes place through loosening the screw 44 and movingthe journal 41 along the axis A. The screw 44 is then retightened andthe journal 41 is fixed in the tube socket 35 by the screw 44. The forcelocked engagement of the end 46 of the screw 44 on the circumference ofthe journal 41 can be effectively reinforced both here and in the otherembodiments by a corrugation or the like on the circumference of thejournal 41.

What is claimed is:
 1. A stripping element for placing on a systemcarrier of a stripping device for a discharge end of a conveyor beltcomprising: a stripping plate which is in the ready-to-operate positionengages in stripping manner on the conveyor belt, a plate support, towhose upper end is fixed the stripping plate, a torsion spring joint onwhich the plate support is guided in pivotable and spring-loaded mannerabout a horizontal axis, a base on which is held the torsion springjoint and which is placed on the system carrier, a vertical adjustmentmeans for the vertical adjustment of the stripping plate along a firstaxis, and a pivot bearing for pivoting the stripping plate about asecond axis for setting the parallelism of a stripping edge of thestripping plate with respect to the conveyor belt, wherein the secondaxis forms an angle smaller than 90° with a conveyor belt portionrunning onto the stripping plate, and wherein the first axis of thevertical adjustment means and the second axis of the pivot bearing areon the same line, wherein the pivot bearing includes a bearing bushconnected to the system carrier and placed in non-rotary manner in atube socket and the base being pivotably mounted in the bearing bush andconnected to the plate support and the stripping plate.
 2. A strippingelement according to claim 1, wherein the vertical adjustment means isconstructed for adjusting the height of the base with respect to thebearing bush.
 3. A stripping element according to claim 1, wherein on aside remote from the plate support a locking screw can be screwed intothe bearing bush for the axial longitudinal fixing of said bush in thetube socket.
 4. A stripping element according to claim 1, wherein thebearing bush and the tube socket are interconnected by a non-rotary plugconnection and the bearing bush has at least one projection and the tubesocket has on its upper edge a recess associated with the projection. 5.A stripping element according to claim 3, wherein an edge of the lockingscrew has a diameter which is somewhat smaller than the internaldiameter of the tube socket, such that the locking screw and the bearingbush form between them a conical squeezing surface occupied by an O-ringsuch that when the locking screw is tightened the O-ring is pressedagainst the inner wall of the tube socket.
 6. A stripping elementaccording to claim 5, wherein the inside of the tube socket is providedwith a groove into which is introduced the O-ring when the locking screwis tightened.
 7. A stripping element according to claim 3, wherein thevertical adjustment means encloses a setscrew accessible through thelocking screw and whose fixing takes place outside the adjustment byfrictional engagement.
 8. A stripping element according to claim 7,wherein the setscrew engages an adjusting bush, which is placed inaxially displaceable, but non-rotary manner in the bearing bush.
 9. Astripping element according to claim 8, wherein the adjusting bush has anose, the bearing bush has a longitudinal groove and wherein the noseengages in the longitudinal groove.
 10. A stripping element according toclaim 9, wherein the longitudinal groove has an adjustment limitation inthe form of a pin, which is driven into the bearing bush transversely tothe axial direction.
 11. A stripping element according to claim 7,wherein the setscrew is rotatable, but is axially fixed in the lockingscrew.
 12. A stripping element according to claim 7, wherein thesetscrew and the locking screw is in each case a socket head screw witha circular edge.
 13. A stripping element according to claim 1, whereinthe stripping plate is mounted in freely rotatable manner limited to anangle about the second axis by the pivot bearing.
 14. A strippingelement according to claim 13, wherein the angle has a value between 15°and 3°.
 15. A stripping element according to claim 13, wherein theadjustment means has an elongated hole and the base has at the sameheight a transverse bore and through the elongated hole and thetransverse bore passes a pin, so that the base is pivotable by a limitedamount with respect to the adjustment means, but is connected insubstantially clearance-free manner therewith in the axial direction.16. A stripping element according to claim 1, wherein the bearing bushis made from plastic.
 17. A stripping element according to claim 1,wherein in its installed position in the stripping device, the baseextends substantially parallel to a conveyor belt running direction andthe torsion spring joint is fixed by one spring end to a free end of thebase and at the other spring end is fitted the pivot bearing with theplate support.
 18. A stripping element according to claim 17, wherein,considered from above, in the installed position the pivot bearing islaterally displaced with respect to a centre axis of the base on thetorsion spring joint.
 19. A stripping element according to claim 1,wherein the plate support is fixable in the pivot bearing inpredetermined pivot positions with respect to the second axis.
 20. Astripping element according to claim 1, further including anintermediate sleeve displaceable in the tube socket and provided betweenthe latter and the bearing bush.
 21. A stripping element according toclaim 20, wherein the tube socket and the intermediate sleeve are madefrom metal.
 22. A stripping element according to claim 20, furtherincluding a screw radially screwable from an outside to an inside in athreaded bore in a wall of the tube socket and whose inner end, for thepositioning of the intermediate sleeve relative to the socket, engagesin a groove running axially and externally on the sleeve and presses onthe bottom of the groove for fixing the intermediate sleeve in the tubesocket.
 23. A stripping element according to claim 22, wherein thelength of the groove is designed for a predetermined axial displacementof the intermediate sleeve in the tube socket.
 24. A stripping elementaccording to claim 1, wherein the vertical adjustment means and thepivot bearing are placed in the form of a constructional unit in thetube socket.
 25. A stripping element according to claim 1, wherein thevertical adjustment means is constructed for adjusting the height of thejournal with respect to the bearing bush.
 26. A stripping elementcomprising a base which can be inserted in a mounting support on asystem carrier of a stripping device wherein the base is secured in themounting support by a fixing means and the base has a componentcooperating with a locking means of the mounting support to prevent arotary movement of the base relative to the mounting support wherein thebase has a spring-loaded, transversely directed, radially displaceablepin in a recess, which is associated with a bore as part of the lockingmeans in the mounting support and engages therein in the installedposition.
 27. A stripping element for placing on a system carrier of astripping device for a discharge end of a conveyor belt comprising: astripping plate, which in the ready-to-operate position engages instripping manner on the conveyor belt, a plate support, to whose upperend is fixed the stripping plate, a torsion spring joint on which theplate support is guided in pivotable and spring-loaded manner about ahorizontal axis, a base on which is held the torsion spring joint andwhich is placed on the system carrier, a vertical adjustment means forthe vertical adjustment of the stripping plate along a first axis, and apivot bearing for pivoting the stripping plate about a second axis forsetting the parallelism of a stripping edge of the stripping plate withrespect to the conveyor belt, wherein the second axis forms an anglesmaller than 90° with a conveyor belt portion running onto the strippingplate, and wherein the first axis of the vertical adjustment means andthe second axis of the pivot bearing are on the same line, wherein thepivot bearing includes a bearing bush connected to the system carrierand placed in non-rotary manner in a tube socket and a journal pivotablymounted in the bearing bush and connected to the plate support and thestripping plate.
 28. A stripping element according to claim 27, whereinon a side remote from the plate support a locking screw can be screwedinto the bearing bush for the axial longitudinal fixing of said bush inthe tube socket.
 29. A stripping element according to claim 27, furtherincluding an intermediate sleeve displaceable in the tube socket andprovided between the latter and the bearing bush.
 30. A strippingelement according to claim 29, wherein the intermediate sleeve, thebearing bush and the journal are encapsulated by a plug at the lower endof the intermediate sleeve, the diameter of the plug corresponding at amaximum to the external diameter of the intermediate sleeve.
 31. Astripping element according to claim 30, wherein the vertical adjustmentmeans is formed by a setscrew engaging in a threaded bore in the tubesocket and through which at least the journal is movable along the firstaxis.
 32. A stripping element according to claim 31, wherein thesetscrew engages on the plug and the intermediate sleeve with thebearing bush and the journal is axially displaceable through thesetscrew.
 33. A stripping element according to claim 29, wherein thejournal has a radially directed elongated hole through which extends apin connected to the intermediate sleeve.